대한전자공학회논문지SD (Journal of the Institute of Electronics Engineers of Korea SD)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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이식형 심장 박동 조절 장치용 저 전력 4차 대역통과 Gm-C 필터

Low-Power 4th-Order Band-Pass Gm-C Filter for Implantable Cardiac Pacemaker

  • 임승현 (연세대학교 전기전자공학과) ;
  • 한건희 (연세대학교 전기전자공학과)
  • Lim, Seung-Hyun (Department of Electrical Electronic Eng., Yonsei University) ;
  • Han, Gun-Hee (Department of Electrical Electronic Eng., Yonsei University)
  • 발행 : 2009.01.25
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초록

저 전력 소모는 의료용 이식 장치에서 매우 중요한 요소가 된다. 본 논문에 제안된 이식형 심장 박동 조절기의 감지 단에 필요한 저 전력 4차 Gm-C 필터는 다단 증폭 단으로 구현 되었다. 매우 큰 시상수를 구현하기 위해서 전류 분할 및 플로팅-게이트 기법이 적용된 OTA가 사용되었다. 측정 결과, 필터는 50 dB의 SFDR을 가지며, $1.8{\mu}$, W의 전력이 소모되었다. 전원 전압은 1.5 V가 공급되었고, 코어는 $2.4\;mm{\times}1.3\;mm$의 실리콘 면적을 차지한다. 제안된 필터는 1-poly 4-metal $0.35-{\mu}m$ CMOS 공정에서 제작되었다.

Low power consumption is crucial for medical implantable devices. A low-power 4th-order band-pass Gm-C filter with distributed gain stage for the sensing stage of the implantable cardiac pacemaker is proposed. For the implementation of large-time constants, a floating-gate operational transconductance amplifier with current division is employed. Experimental results for the filter have shown a SFDR of 50 dB. The power consumption is below $1.8{\mu}W$, the power supply is 1.5 V, and the core area is $2.4\;mm{\times}1.3\;mm$. The filter was fabricated in a 1-poly 4-metal $0.35-{\mu}m$ CMOS process.

키워드

참고문헌

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